Spark arrester



May 25, 1926.

v. HOWARD SPARK ARRESTER Filed March 1'7, 1924 INVENTOR.

. tially Patented May 25, 1926.

VALGENE HOWABD, OF FLINT, MICHIGAN.

SPARK mm Application 111511 March 11,1924. Serial No. ceases.

A further object is to entrap any large fragments of ignited material rising with the draft, such as scraps of paper, in advance of the spark arnester, proper, the latter bein proportioned to prevent the escape of relatively small ignited articles.

A still further object of t e invention is to provide, a simple means, for securing the ark arrester in a substantial manner to the c imney coping.

The above and other objects will be ap".

parent from the following description wherein reference is made to the accompanying drawings, illustrating a preferred embodiment of my invention.

In the drawings Figure 1 is a view in side elevation, parin section of the improved spark arrester applied to a chimney. Figure 2 is a top view of the same, partially in section, on line 2-2 of Figure 1. In these views, the reference character 1 designates a chimney, provided at its top with the usual outward y projecting coping 2. The invention surmounts said chimney by an enclosure 3, formed of wire screen or other foraminous material, preferably cylindrical.

To said enclosure isrigidly connected the sheet metal base 4 and cover 5, the latter being preferably conical. Angle-iron rings 6 and 7 may be employed to secure to said enclosure the cover and base thereof, said rings being riveted or otherwise suitably secured to the parts which they connect.

The base 4 is comprised of a rectangular sheet-metal plate having a central circular openin the corners of said base being cut away see Figure 2) and its marginal portions bein downturned to embrace the co ing 2 of t e chimney, and bent beneath said coping, as indicated at 8, to positively hold M sziid base (and the entire spark arrester) in ace. P Through the apex of the cover 5 is passed a vertical shaft 9, journaled in bearin 10 and 11, the former being directly interiorly e chimney, and to carried by said cover, and the latter being supported by the cover, somewhat below the latter, through a plurality of arms 12.

Said shaft is adapted to be wind-driven by a vane wheel 13, fast thereupon above the cover, said wheel being of any suitable construction. ,Upon the lower end of said shaft,.just above the base 4, is mounted a fan 14, which when said shaft is driven supplements the natural draft prevailing in the chimney 1. Above said fan and centrally within the enclosure 3, a plurality of large radial vanes 15 are fast upon the shaft 9.

From the base 4, there rigidly depends a sheet metal cylinder 16, open at its ends and having its upper end registerin with the central opening of said base. Sa1d cylinder is spaced from the chimney 1, and is formed with perforations 17 of larger area than the openings of the enclosure 3, a similar circle 18 of such perforations being formed in the 75 base between said cylinder and enclosure.

In the use of the described invention, any relatively large fragments of paper or other burning material that may be carried up the chimney will, in most cases ascend close to the wall thereof. Such fragments, therefore, will be trapped between the cylinder 16 and said wall and will burn harmlessly.

The large perforations 17 and 18 allow the heated air and gases of combustion to rise freely through the space between said cylinder and the chimney wall, so as to carry such large fragments into this space. Sparks and relatively small burnin fragments, rising intothe enclosure 3 'wil lodge against the screen wall of said enclosure, while the heated air and gases will pass freely through said wall. Such of said sparks and fragments as encounter the rotating vanes 15 will be thrown b the latter forcibly against the screen we 1, and will be more or less extinguished by impact with said vanes.

The fan 14 will intensify the draft more or less according to the velocity of the wind and the resulting rotational speed of the shaft 9.

The described attachment of the device to the chimney coping1 is very secure and may be quickly esta lis ed. 105

From the foregoing description it becomes evident that the devlce is very simpleand efficient in operation, will not easily get out of order, operates automaticall and provides a device which accomplis es the objects described.

While it will be apparent that the illustrated embodiment of my invention herein disclosed is well calculated to adequately fulfill the objects and advantages primarily stated, it is to be understood that the invention is susceptible to variation, modification and change within the spirit and scope of the subjoined claims.

Having thus described my invention, I-

claim 1. A spark arrester comprising a base adapted to be superposed upon a chimney, an mclosure attached to said base thereabove having a foraminous wall, and adapted to communicate through the base with the chimney and a perforated cylindrical member carried by said base therebeneath, adapted to depend into said chimney in spaced relation to the wall thereof.

2. A spark arrester corrprising a base engageable with the outlet end of a chimney, a foraminous inclosure secured to said base and projecting upwardly therefrom, and a cylindrical member projecting downwardly therefrom and having perforations exceeding in'size the openings in the foraminous inclosure, and adapted to form with the inner wall of the chimney a trap for the larger ignited particles carried up through the chinmey and said foraminous wall retaining the smaller particles.

h In; witness whereof I hereunto set my VALGENE HOWARD. 

